Information about an airport’s water quality drives important decisions associated with permitting, regulatory compliance, development planning, infrastructure modifications, asset management as well as facility operations and maintenance. As part of its mission to provide practical solutions to problems that airports commonly face, the Airport Cooperative Research Program (ACRP) called on Gresham Smith to develop a report on interpreting data collected from water leaving the airport that does not go to an off-site treatment facility. We developed an intuitive guidebook filled with practical advice and easy-to-use tools, literally writing the book on proactive water quality management.


Airport Cooperative Research Program (ACRP); Transportation Research Board; National Academies of Sciences, Engineering and Medicine


Washington, D.C.

Project Type

Aviation, Stormwater


user-friendly data analysis tool


pages of guidance


case studies from North American airports

Guidebook Basics

Guidebook Basics

ACRP Research Report 166 includes offers guidance and tools for acquiring data, interpreting the data and applying the results. The guidebook also helps airports understand the variety of monitoring tools available, alternate techniques for evaluating data and how to choose the best tools for the job.

The Toolkit

The Toolkit

The guidebook’s tools include a field data collection spreadsheet, fact sheets describing commonly observed field conditions, a data analysis tool and a customizable fact sheet database. We also provided a user-friendly Microsoft® Excel™ spreadsheet for statistical analysis that creates basic statistics and graphs from user data and a Microsoft® Access™ database.

Beyond the Numbers

Beyond the Numbers

In addition to tools for statistical analysis, the guidebook also outlines how to apply monitoring data to establish permit conditions, assess regulatory compliance issues, support operations, improve airport stormwater quality, communicate with stakeholders, and conduct public outreach. We also included three case studies from North American airports that describe both practical lessons learned and unique solutions to water monitoring issues.

View/Purchase ACRP Research Report 166: Interpreting the Results of Airport Water Monitoring on the Transportation Research Board’s website.

Project Contact

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Tim Arendt, P.E.
Tim Arendt, P.E.
Senior Environmental Engineer